Dr. Macchia teaches courses in Theology and Church History in both the graduate and undergraduate programs. He is past president of the Society for Pentecostal Studies and is the Editor of PNEUMA: The Journalof the Society for Pentecostal Studies. He is a prolific writer having published a much anticipated book for Zondervan titled “Baptized in the Spirit: A Global Pentecostal Theology.” His most recent book is entitled, Justified in the Spirit: Towards a Trinitarian Soteriology (Eerdmans Pub., 2009). His recent publishing also includes a number of essays, most notably: “Pentecostal Eschatology,” in the Oxford Handbook ofEschatology, Jerry Walls, ed. (Oxford University Press, 2007); “The Spirit of God and the Spirit of Life: An Evangelical Response to Karl Barth’s Pneumatology,” in Karl Barth and Evangelical Theology: Convergences and Divergences,” Sung Wook Chung, ed. (Baker Academic, 2006); “The Kingdom and the Power: Spirit Baptism in Pentecostal and Ecumenical Perspective.” in The Work of the Spirit: Pneumatology and Pentecostalism” Michael Welker, ed. (Wm B. Eerdmans, 2006); and “Babel and the Tongues of Pentecost: Reversal or Fulfillment? A Theological Perspective”, in Speaking in Tongues: Multidisciplinary Perspectives, Mark Cartledge, ed. (Pater Noster, 2006). He is also a frequent lecturer, having traveled recently as a guest speaker to a wide spectrum of venues, including McCormick Theological Seminary, University of Southern California, MacMaster University, and Martin Luther University (Wittenberg, Germany).